[llvm] [SYCL][LLVM] Adding property set I/O library for SYCL (PR #110771)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,72 @@
+//===- llvm/unittest/Support/PropertySetIO.cpp - Property set I/O tests ---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/PropertySetIO.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace llvm::util;
+
+namespace {
+
+TEST(PropertySet, IntValuesIO) {
+  // '1' in '1|20' means 'integer property'
+  auto Content = "[Staff/Ages]\n"
+                 "person1=1|20\n"
+                 "person2=1|25\n"
+                 "[Staff/Experience]\n"
+                 "person1=1|1\n"
+                 "person2=1|2\n"
+                 "person3=1|12\n";
+  auto MemBuf = MemoryBuffer::getMemBuffer(Content);
+  // Parse a property set registry
+  auto PropSetsPtr = PropertySetRegistry::read(MemBuf.get());
+
+  if (!PropSetsPtr)
+    FAIL() << "PropertySetRegistry::read failed\n";
+
+  std::string Serialized;
+  {
+    llvm::raw_string_ostream OS(Serialized);
+    // Serialize
+    PropSetsPtr->get()->write(OS);
+  }
+  // Check that the original and the serialized version are equal
+  ASSERT_EQ(Serialized, Content);
----------------
arsenm wrote:

```suggestion
  EXPECT_EQ(Serialized, Content);
```

https://github.com/llvm/llvm-project/pull/110771